說概率不能離開所統計的對象。新生兒中有五分之一概率是中國人統計對象全世界所有新生兒。

來源: 龍劍於 2020-05-22 10:00:17 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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